hg: jdk/sandbox: merge stuff

[markus.gronlund at oracle.com]

Changeset: 0e549560be5e
Author:    mgronlun
Date:      2019-09-12 10:49 +0200
URL:       https://hg.openjdk.java.net/jdk/sandbox/rev/0e549560be5e

merge stuff

! src/hotspot/share/jfr/recorder/stacktrace/jfrStackTrace.cpp
! src/hotspot/share/jfr/support/jfrThreadLocal.cpp